6. 'Zarúd and its sands,' i.e. elusive sorts of knowledge which are not to be apprehended save in moments of ecstasy.

'And of those who chant,' etc. The ḥádí who drives the camels from behind typifies that which comes with fear and chiding and menaces, while the ḥádí who goes in front of the camels typifies that which comes with hope and joy and kindness. The former is the servant of the Wrathful (###), and the latter is the servant of the Merciful (###).